scores set on custom rulesets should be deletable

[voidstar0]

Fixes #36596

A bug exists where scores saved on custom rulesets cannot be deleted. This is because custom rulesets cause IsLegacyRuleset to return false, thus, the legacy replay reader does not engage and the Files attribute on the score does not get incremented (and thus the Delete button is hidden).

This PR introduces a change to always show the Delete button regardless.

I also wrote a test for this case :-)

fixed.mp4

[bdach]

This causes the delete context menu option to show on online leaderboards. When clicked, it does nothing.

[voidstar0]

oops! apologies and thanks for catching this.

I updated the code to check if the score was set by the local player || files > 0. (hopefully this is the correct approach!)

also included a test 😺

fixed2.mp4